JP2014004274A - Drum washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage by detecting the pinching of laundry by a lid of a drum washing machine.SOLUTION: A drum washing machine comprises: a clothing put-in opening 39 of a water tank which is provided in a water tank 32 while facing an opening 37, for putting clothing into the water tank; a motor 34 rotatably driving a rotary drum 30; a packing member 62 connected between the opening 37 and the clothing put-in opening 39 of the water tank and made of an elastic material; a lid body 38 being in contact with the packing member 62 and covering the opening 37 so as to be freely opened/closed; motor current detection means 60 detecting a drive current of the motor 34; and control means 51 controlling the motor 34 to successively control a series of steps of washing, rinsing and dewatering. During the rotation of the rotary drum 30 in a water supply step at early stage of the washing step, when a current value of the motor 34 exceeds a predetermined current value a predetermined number of times or more in a predetermined range of rotational frequency, the control means 51 detects the pinching of laundry between the lid body 38 and the packing member 62 and thereby prevents water leakage or the like due to the coming-off of the packing member.

Description

  The present invention relates to a drum type washing machine for washing laundry contained in a rotating drum.

  Conventionally, this type of drum-type washing machine has a front opening of a rotating drum in order to prevent water accumulated in the water tank from leaking inside or outside the washing machine body during washing or dehydration. The structure which provides the packing member which connects them between the opening part of a corresponding water tank and the main body front surface opening part is proposed (for example, refer patent document 1).

  FIG. 4 is a longitudinal sectional view of a conventional drum-type washing machine described in Patent Document 1, and FIG. 5 is a sectional view of an essential part around a packing member of the drum-type washing machine.

  4 and 5, the front plate 13 located inside the panel member 7, which is the front side member constituting the main body 1, has a circular front plate opening corresponding to the drum opening 6 of the rotating drum 4. A portion 14 is formed. The front surface of the front plate 13 is covered with the panel member 7.

  The water tank opening 15 of the water tank 5 containing the rotating drum 4 is also located inside the opening member 8 having the front opening 8a for putting in clothes and facing the front plate opening 14 of the front plate 13. Thus, the space between the water tank opening 15 of the water tank 5 and the front plate opening 14 of the front plate 13 is sealed with an annular cylindrical packing member 16 made of an elastic material such as rubber, and from the same interval. Intrusion of water into the main body 1 is prevented.

  Further, the outer periphery of the closed lid body 9 comes into contact with the inner peripheral surface of the lip portion 16a of the packing member 16, and a seal between the two is performed, thereby preventing leakage of water and steam from the outer periphery of the lid body 9. doing.

  Further, the water tank 5 side of the packing member 16 is attached to the outer periphery of the water tank opening 15 and is fixed by a wire 22. A flange portion 16b is provided on the front plate 13 side of the packing member 16, and the flange portion 16b is provided on the front plate 13 by fixing the mounting plate 17 to the front plate 13 with screws 21 from the front surface. The concave portion 13a and the convex portion 17a provided on the mounting plate 17 are clamped and fixed.

Japanese Patent Laid-Open No. 2005-143795

  However, in the conventional configuration, when the user puts the laundry in the rotating drum and closes the lid, a part of the laundry is sandwiched between the outer periphery of the lid and the packing member, and the operation is continued. Since it started, the rotation of the rotating drum caused the laundry to be pulled into the rotating drum with a large force as if the packing member was wound around, and the packing member might come off.

Even if the laundry is operated while being sandwiched between the lid and the packing member, the present invention detects that the laundry is caught and notifies the user that the laundry has been caught. Accordingly, an object of the present invention is to provide a drum-type washing machine that prevents water leakage or the like due to the detachment of the packing member.

  In order to solve the conventional problems, a drum-type washing machine according to the present invention includes a washing machine housing having an opening on the front surface, a water tank provided in the washing machine housing, and the water tank facing the opening. An aquarium clothing inlet / outlet through which clothes are placed, a bottomed cylindrical rotating drum contained rotatably in the aquarium, a motor for rotationally driving the rotating drum, the opening, and the aquarium clothing inlet / outlet A packing member made of an elastic material connected between the cover member, a lid member that contacts the packing member and covers the opening so as to be openable and closable; motor current detecting means for detecting a drive current of the motor; and controlling the motor. Control means for sequentially controlling a series of steps of washing, rinsing, and dehydration, and the control means is more than a predetermined number of times in a predetermined rotational speed range when the rotating drum rotates during a water supply stroke at an initial stage of the washing stroke. When the current value of the motor exceeds a predetermined current value, it is to determine the laundry and sandwiched between the lid and the packing member.

  Accordingly, even if the user accidentally drives the laundry with the lid sandwiched between the lids, it is possible to prevent the packing member from coming off due to the laundry being caught and to prevent water leakage.

  The drum type washing machine of the present invention can detect the pinching of the laundry, prevent the packing member from coming off due to the laundry being caught, and prevent water leakage.

The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention Block diagram of the drum type washing machine The graph which shows the relationship between elapsed time and motor electric current value of the drum type washing machine Vertical section of a conventional drum-type washing machine Cross section of the main part of the drum type washing machine

  The first invention includes a washing machine housing provided with an opening on the front surface, a water tub provided in the washing machine housing, a water garment clothing inlet / outlet for charging clothes provided in the water tub facing the opening, A bottomed cylindrical rotating drum enclosed in a water tank, a motor for rotationally driving the rotating drum, and a packing member made of an elastic material connected between the opening and the water tank clothing doorway; A lid that contacts the packing member and covers the opening in an openable and closable manner, motor current detecting means for detecting the drive current of the motor, and the motor is controlled so that a series of steps of washing, rinsing, and dewatering are sequentially performed. Control means for controlling, when the rotating drum rotates in the water supply stroke at the initial stage of the washing stroke, when the current value of the motor exceeds a predetermined current value in a predetermined rotation speed range, By determining the sandwich is laundry between the lid and the packing member, to prevent out-of packing member by entrainment of the laundry, it is possible to prevent water leakage.

  In a second aspect of the invention, particularly in the drum-type washing machine according to the first aspect of the invention, the display unit displays operation details, and the control unit determines that the laundry is sandwiched between the lid and the packing member. When this happens, the rotation of the rotating drum is stopped, and an abnormality is notified by the display means, so that the user can eliminate the pinching of the laundry and prevent water leakage due to the packing member coming off. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine in an embodiment of the present invention.

  In FIG. 1, the rotating drum 30 is formed in a bottomed cylindrical shape, and a large number of water passage holes 31 are provided on the entire surface of the outer periphery, and are rotatably disposed in a water tank 32. A rotation axis (rotation center axis) 33 is provided at the rotation center of the rotary drum 30 in the inclination direction, and the axial center direction of the rotation drum 30 is inclined downward from the front side toward the back side. A motor 34 attached to the rotating shaft 33 in the vicinity of the back side of the water tank 32 is connected via a belt 59, and the rotating drum 30 is rotationally driven in the forward and reverse directions by the motor 34. On the inner wall surface of the rotating drum 30, several protruding plates 35 for stirring the laundry are provided.

  The rotating drum 30, the water tank 32, the motor 34, etc. constitute a vibration water tank unit 61.

  An opening 37 provided on the upward inclined surface of the washing machine housing 36 on the front side of the aquarium 32 is covered with a lid 38 so that it can be opened and closed. By opening the lid 38, the opening 37, the aquarium clothing entrance 39 and the rotating drum Laundry is put into the rotary drum 30 through the clothing doorway 40 so that the laundry can be taken out from the rotary drum 30. Since the lid body 38 is provided on the upward inclined surface, the user can reduce the degree of bending the waist when putting in and out the laundry.

  In addition, a substantially cylindrical packing member 62 made of an elastic material such as rubber is connected between the opening 37 of the washing machine housing 36 and the water tank clothing doorway 39, and water is supplied from the water tank 32 to the washing machine housing 36. Prevents jumping in. In addition, the lid 38 side of the packing member 62 is in contact with the outer periphery of the rear side of the lid 38 when the lid 38 is closed, and seals the water from the outer circumference of the lid 38. It is preventing.

  The water tank unit 61 is supported by the spring body 41 and the vibration damper 42 from the washing machine housing 36 so as to be swingable. The water tank unit 61 has a concave drainage groove 43 extending in the direction of the rotation shaft 33 at the inner bottom of the water tank 32. Is provided. A drainage port 44 is provided near the back side of the bottom of the drainage groove 43, one end of the drainage channel 45 is connected to the drainage port 44, and the other end of the drainage channel 45 is connected to a drainage valve (drainage means) 46. Thus, the washing water in the water tank 32 is drained.

  Further, vibration detection means 58 is provided on the upper front side of the water tank 32 to detect the vibration of the water tank unit 61.

  A water supply valve (water supply means) 47 provided in the upper part of the washing machine housing 36 supplies the wash water into the water tank 32 through the detergent case 48 and the water supply path 48a, and the water level detection means 49 is provided in the water tank 32. It is provided to detect the water level inside.

  The control device 50 is provided inside the upper portion of the washing machine housing 36, and an operation display unit 63 is disposed on the upper front surface of the washing machine housing 36. In the operation display section 63, an input setting means 53 for a user to set a driving course, a water level, etc., and start / stop driving, and display means 54 for displaying the setting contents and the progress of driving, etc. Is provided.

  FIG. 2 is a block circuit diagram of the drum type washing machine in the embodiment of the present invention.

In FIG. 2, the control means 51 of the control device 50 is constituted by a microcomputer or the like, and starts operation by supplying power from the commercial power source 56 when the power switch 57 is turned on, and detects the rotation speed of the motor 34. Rotational speed detection means 34a for detecting the rotational speed of the rotary drum 30
The outputs of the motor current detecting means 60, the water level detecting means 49, the vibration detecting means 58, etc. for detecting the drive current of the motor 34 are inputted, and the motor 34 is connected via the power switching means 52 constituted by a bidirectional thyristor, a relay, etc. The operation of the drain valve (DV) 46, the water supply valve (FV) 47, etc. is controlled, and a series of steps of washing, rinsing and dewatering are sequentially controlled.

  Also, the control means 51 displays the setting contents on the display means 54 based on the contents set by the user's input in the input setting means 53 and notifies the user. If there is any abnormality in the operation, the display means 54 notifies the user. The storage means 55 stores data necessary for control by the control means 51.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the user opens the lid 38, puts laundry into the rotary drum 30, puts a predetermined amount of detergent into the detergent case 48, and starts operation, first, the washing process is executed.

  In the water supply process at the initial stage of the washing process, the water supply valve 47 operates to supply the washing water. The washing water passes through the detergent case 48 and the water supply path 48a and enters the water tank 32 together with the detergent. At this time, in order to eliminate variation in the cleaning performance and to perform efficient cleaning, the rotating drum is rotated at a low speed for a predetermined time at a predetermined number of rotations for the purpose of foaming the detergent and uniformly wet the clothes.

  When the motor current is monitored by the motor current detecting means 60 that detects the drive current of the motor 34 during this fixed time, and the current value of the motor 34 exceeds a predetermined motor current upper limit value a predetermined number of times or more, The control means 51 determines that the laundry is sandwiched between the outer periphery of the lid body 38 and the packing member 62, stops the rotation of the rotary drum 30, and notifies the display means 54 of the abnormality.

  FIG. 3 is a graph showing the relationship between the elapsed time and the motor current value in the drum type washing machine in the embodiment of the present invention.

  In FIG. 3, a graph (a) represents a motor current value and a lapse of time when the laundry is not caught. At this time, the motor current value is a substantially constant value.

  The graph (b) represents the motor current value and the passage of time when the laundry is sandwiched in the gap between the lid body 38 and the packing member 62. Point A is a state in which the laundry sandwiched in the gap between the lid body 38 and the packing member 62 is starting to twist, point B is a state in which the laundry is entraining the packing member 62, and point C is a packing member This is the state immediately before 62 is released.

  Here, since the motor current value is constantly monitored and the threshold value is set to 250 mA, when the motor current value exceeds the threshold value a predetermined number of times or more, the control unit 51 causes the laundry to be covered with the lid 38. And the packing member 62 is determined to have been sandwiched, the rotation of the rotary drum 30 is stopped, and the display means 54 notifies the user of an abnormality in the laundry.

  As described above, the motor current value detected by the motor current detection means exceeds the predetermined motor current upper limit value a predetermined number of times or more in the predetermined rotation speed range when the rotating drum rotates in the water supply process at the initial stage of the washing process. When it is determined that the laundry is caught in the gap between the lid and the packing member, it is possible to prevent the packing member from coming off due to the laundry being caught and to prevent water leakage.

  In addition, when it is determined that the laundry is caught in the gap between the lid and the packing member, the rotation of the rotating drum is stopped, and an abnormality is notified by the display means, thereby preventing the user from pinching the laundry. Water leakage due to detachment of the packing member can be prevented.

  As described above, the drum-type washing machine according to the present invention detects the pinching of the laundry and notifies the abnormality so that the user can eliminate the pinching of the laundry and the packing member comes off. Therefore, it can be applied to other uses such as other washing machines having a lid.

DESCRIPTION OF SYMBOLS 30 Rotating drum 32 Water tank 34 Motor 36 Washing machine housing 37 Opening part 38 Cover body 39 Water tank clothes entrance / exit 51 Control means 53 Input setting means 54 Display means 60 Motor current detection means 62 Packing member 63 Operation display part

Claims (2)

A washing machine housing provided with an opening on the front surface, a water tank provided in the washing machine housing, a water tank clothing entrance facing the opening and charging clothes provided in the water tank, and rotatable in the water tank A cylindrical rotating drum with a bottom included therein, a motor for rotating the rotating drum, a packing member made of an elastic material connected between the opening and the aquarium clothing entrance, and abutting against the packing member A lid that freely opens and closes the opening, motor current detection means for detecting the drive current of the motor, and control means for controlling the motor to sequentially control a series of steps of washing, rinsing and dehydration. And the control means is configured to rotate the rotating drum in a water supply stroke in the initial stage of the washing stroke when the current value of the motor exceeds a predetermined current value for a predetermined number of times or more in a predetermined rotation speed range. Determining a drum type washing machine laundry and sandwiched between the King member. Display means for displaying operation details, and when the control means determines that the laundry is sandwiched between the lid and the packing member, the control means stops the rotation of the rotating drum, and the display means The drum type washing machine according to claim 1, which performs notification.